Means for ventilating telephone-booths.



E. l. STEVENSON.

MEANS FOR VENTILATING TELEPHONE BOOTHSJ APPLICATION FILED JUNE I4, 1915.

1,207,090. Patented Dec. 5,1916.

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UNITED; STATES PATENT OFFICE.

EDEN J. STEVENSONQOF BOSTON, MASSACHUSETTS- MEANS FOR VENTILATIN G TELEPHONE-BOOTHS.

To all whom it may concem Be it known that I, EBEN J STEVENSON, a citizen of the United States, residing at Boston, in 'the county of Suffolk, in the State of Massachusetts, have invented a new and useful Means for Ventilating Telephone- Booths, of which the following is a specification, reference being had to the accompanying. drawings.

The immediate object of this invention is to provide extremely simple, cheap, and positively acting means for automatically energizing, and setting in operation, an .electric fan in a telephone booth, whenever the telephone is used. Booths of this type, as now commonly provided, are designed to be tightly closed while they are being used, in order that the conversation may not be overheard and, when they are thus closed, the air in the booth becomes foul and heated, particularly in hot weather, and the intent of this invention is to provide a circulation of the air in the booth and to thereby cool said air in an appreciable degree.

Briefly described my invention comprises an overhead fan which is wired in circuit with a suitable battery or other .source of electric energy, and a make-and-break for. said circuit which serves also as the hook uponwhich the telephone receiver is hung when the telephone is not in service.

My invention is illustrated in the annexed drawing which is a vertical, sectional, view of a telephone booth, having located therein a fan and means, embodying my present improvement, for automatically starting and stopping the said fan.

Referring to the said drawing, the letter (1 indicates a booth, b a wall telephone mounted in said booth, and 0 denotes an electric fan mounted overhead in the booth.

at indicates a battery and e the receiver hook of the telephone, said hook being of the ordinary type, that is to say it is hinged v specification of Letters Patent. Patented Dec. 5, 1916. Application filed June 14, 1915. Serial No. 33,902.

at its inner end portion and the receiversupporting end is adapted to be raised a limited distance, by a suitable spring, whenever the receiver is removed from the book. As here illustrated one pole of the fan magnet or motor is connected with the battery by a wire 7, the other pole of the battery being connected with the receiver hook by a wire 9, and the other pole of the fan motor is connected by wire 70 with a fixed contact h which is located immediately in the pathof the receiver-hook arm 6 but out of engagement with said arm when the receiver is hanging on the hook, and as seen in the annexed drawing. So long as the telephone is not in service, and the receiver remains on the hook, the described circuit is. open and the fan is still but the instant that the receii'er is removed from the hook the arm 6 moves upward, into engagement with the contact it, thus closing the said circuit and energizing the fan motor, which continues to run until the receiver is returned to the hook and the circuit is automatically opened. Thus it will be seen that the fan is controlled as to its starting and stoppin by the use and disuse of the telephone, an this desirable result is attained with practically no additional expense. I

Having thus described my invention, I claim as new and wish to secure by Letters Patent A device of the type described, including a telephone, an electric circuit, a motor-- controlled fan, with a source of electric energy, a resiliently actuated pivoted hook for the receiver, a contact-point wired to one pole of the fan-motor, said contact-point being arranged to be automatically engaged by said hook upon the removal of said receiver from the hook, said fan-controlled motor and receiver hook being includedin the said electric circuit.

EBEN J. STEVENSON.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington. D O. 

